Understanding pidbox queue names

[rgov]

I'm trying to debug a piece of third-party software that uses Celery (and therefore, indirectly, Kombu) for a remote control mailbox. I apologize for asking RTFM-able questions, but I spent a bit of time and could not unravel these.

It looks like somewhere in the stack a queue is created with a name like [email protected]. Note that this includes my computer's hostname, but some references I've found seem to use UUIDs instead of the hostname.

1. What is the celery@ part called / referring to? Actually what are all the parts of this referring to? It is kind of un-Googleable.
2. Is there a reason to override the celery@ (e.g., to associate it with the application user associated with the queue)? If so, how?
3. How do I override the use of the hostname?
4. In what cases is a UUID used instead of the hostname?
5. What is responsible for generating these names, Kombu or Celery? Does it vary based on the selected backend (e.g., RabbitMQ vs Redis)?

(Edit: I didn't see that discussions are enabled for this repo, feel free to transfer it there, or to the celery/celery repo if that's more appropriate.)

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